"Added non-passive event listener to a scroll-blocking 'touchstart' event"

I'm getting a warning from Firefox:

```
 Added non-passive event listener to a scroll-blocking 'touchstart' event. Consider marking event handler as 'passive' to make the page more responsive. See https://www.chromestatus.com/feature/5745543795965952
```

```

eventManager | @ | Event.js:290
root.add | @ | Event.js:45
```

Any plans to address this in the near future? Thanks